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slava [35]
3 years ago
12

Kinetic energy is the energy an object has because it is A. At rest B. Moving C. Stretched D. Above the ground

Physics
1 answer:
Anastasy [175]3 years ago
8 0

Answer:

Kinetic energy is the energy an object has because it is Moving - B.

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A 13,000 kg helicopter accelerates upward a 0.5 m/s^2 while lifting a 2000 pound car. to the nearest newton, what is the lift fo
Vinil7 [7]

Lift force exerted by the air on the rotors=143244 N

Explanation:

we use Newtons second law

F- (M+m)g=(M+m)a

F= lift force

m= mass of helicopter= 13000 Kg

M= mass of car= 2000 lb=907.2 kg

a= acceleration= 0.5 m/s²

g= acceleration due to gravity

F- (M+m)g=(M+m)a

F=(M+m)(a+g)

F=(13000+907.2)(0.5+9.8)

F=143244 N

8 0
3 years ago
Is any force exerted on the vertical sides of the loop that you used in the experiment and how does it affect the apparent mass?
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5 0
3 years ago
A 1.70 m tall woman stands 5.00 m in front of a camera with a 50.00 cm focal
slamgirl [31]

Answer:

18.89cm

Explanation:

As we know that the person is standing 5m in front of the camera

d_0=5m=500cm

The focal length of the lens =50cm

f=50 cm

By Lens formula we have:

\dfrac{1}{f} = \dfrac{1}{d_i} + \dfrac{1}{d_o}\\\dfrac{1}{50} = \dfrac{1}{d_i} + \dfrac{1}{500}\\\dfrac{1}{d_i} =\dfrac{1}{50}-\dfrac{1}{500}\\\dfrac{1}{d_i}=0.018\\d_i=55.56cm

By the formula of magnification

\dfrac{h_i}{h_o} = \dfrac{55.56}{500}\\\\h_i = \dfrac{55.56}{500} \times h_o\\\\ h_o=1.70m=170cm\\\\Therefore: h_i=\dfrac{55.56}{500} \times$ 170 cm\\\\h_i =18.89 cm

The height of the image formed is 18.89cm.

5 0
3 years ago
which type of front occurs when cold air and warm air are next to each other but are at a a stand still ?
algol13
A stationary front
hope this helps
3 0
3 years ago
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The amount of energy that remains after the amount of energy used for respiration is subtracted from the total is called
lawyer [7]

Answer:Gibb's free energy

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The Free energy change describes the amount of energy that is available in any system to do work. It is often designated with the symbol G

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